To have a theory of success, you have to also be able to explain failure. Why did object-oriented C (aka C++) take off but object-oriented Pascal (aka Delphi) n

To have a theory of success, you have to also be able to explain failure. Why did object-oriented C (aka C++) take off but object-oriented Pascal (aka Delphi) not, despite the fact that Pascal was as prevalent as C in those days? Why was Python able to overturn Perl's dominance in the scripting space, but Ruby was unable to do so? Why did Ada and Smalltalk never achieve significant dominance? A lot of success does come down to being in the right place at the right time. JS was successful because it was the only available scripting language for the web (although MS pushed VBScript for a bit) when there was a concerted effort to kill off the Java and Flash plugins. C was successful because it was tied to the Unix OS, which happened to overtake other OSes for a variety of reasons.